Chair-seat



UNITED STATES PATENT OFFICE.

WARREN P. MILLER, OF BROOKLYN, NEW YORK.

CHAIR-SEAT.

SPECIFICATION formingpart of Letters Patent No. 248,336, dated October 18, 1881.

Application filed May 4, 1881.

description thereofas will enable others skilled in the art to make and use my impro\"emen ts.

In said drawings, Figure 1 represents atop view of a chair-seat with a portion of the slats broken away. Fig. 2 represents a crosssection at the place of the greatest depression of the seat. Fig. 3 represents a section of the seat centrally from front to rear.

This invention consists in so constructing a spring-slat chair-seat that the slats cover close and perfectly the whole surface of the seat, but when depressed about one half the surface of the slats drop below the others, and thus present a perfectly-ventilated seat. To effect this result the slats are so arranged that the outer ends of one-half of their number rest upon the side rails, while the other end of the same, and also the intermediate slats, are left free to decline under pressure, all being hinged together centrally on two lines and supported atthe hinges on springs.

It consists, secondly, of the employmentof suitable forms, to which the springs are attached, and into which they are deflected when under pressure, and are thereby protected against the liability of being over-worked or broken.

In the accompanying drawings similar letters of reference indicate like parts.

Letters a represent the front rail; 1) b, the rear rail. 0 c are the side rails; d d, the rear legs; 6 e, the arm-supports; f f, forms for the support of the springs. g g are the springs, which are secured to the front ends of the forms. h h are slats, divided in the center of the seat; a 42, intermediate slats extending from rail to rail; 71 i, thongs or cords, upon which the slats hinge; jj, rabbets in the side rails. k are screws, by which the springs are secured to the forms. Zlshow the capping over the ends of the slats and also at the rear.

The top inside corners of the side rails are rabbeted to the depth equal to the thickness of the slats and framed into the legs in the usual manner. Each end of the forms that (No model.)

support the springs rest in a gain cut into the front and rear rails. They are preferably made of wood, but may be formed of light bar-iron and screwed to the rails.

The springs are made of sheet-steel, and are much broader in the central part, as shown at in. The opposite edge is made straight. The springs are formed a little convex, so that they will force the slats up level when not sat upon. The springs are attached only at the front, leaving the rear end free to contract or distend, as their movement up or down will cause a slight sliding motion of the rear ends on the forms.

The slats are made of hard wood, preferably three-eighths of an inch square. All the slats that rest in the rabbets are divided in the center of their length, as shown at p. The other slats are made so that they will drop freely between the rails. The slats. are all bored uniformly to a gage to receive the cord or thong upon which the slats hinge, which is secured .to the front and rear slats. The front slat is attached to the front rail. All the other slats rest free on the springs and in the rabbets, and the rear slatis allowed to vibrate freely under the capping.

What I claim is- The combination of the seat-frame provided with bearings j, the slats h, divided in the center and having their outer ends resting on the seat-frame, the intermediate slats, n, and the pivots it", connecting the slats h and a, as and for the purpose set forth.

2. The formsf and the springs g, in combination with the chair-frame, as and for the purpose set forth.

3. The combination, with a flexible seat and front rail, of forms or supports:attachcd to the rails, and a supporting spring or springs secured to the front ends of the forms and extending under the seat, the springs being adapted to support the flexible seat, and the forms to limit the motion of the spring or springs, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WARREN P. MILLER.

Witnesses:

T. H. PALMER, A. N. J ASBERA. 

